There is no tile on the top and no place under it
In pinyin, sh à NGW ú PI à NW à, Xi à w ú L à Zhu à zh à D à, it means to describe having nothing and being extremely poor.
source
Song Shidao's original "Jingde Zhuandeng Lu" Volume 20: "there is no tile on the top and no outstanding cone on the bottom. Where do scholars stand?"
Examples
The ninth chapter of he Dian: "it turns out that Liu's harvest of fighting ghosts resulted in female ghosts. He sold the old house site of living ghosts for his fingers, so that there was no tile on the top to cover his body, and there was no place for him to stand, so he had to stay with his mother."
usage
I'm very poor. I'm very poor
There is no tile on the top and no place under it
Hold one's hair and eat one's dinner - wò fā tǔ sūn
punish one as a warning to a hundred - fěng yī quàn bǎi
take instant advantage of an opportunity that comes only once in a long while - jiàn tù gù quǎn